16 U.S. Code § 403d - Lease of lands within Shenandoah National Park and Great Smoky Mountains National Park
The Secretary of the Interior is authorized to lease lands within the Shenandoah National Park and Great Smoky Mountains National Park for periods not exceeding two years, upon such conditions as he may in his discretion deem proper, to persons and educational or religious institutions occupying same or who had or claim to have had some interest in the title to the same prior to the establishment of the park.
Source(Feb. 16, 1928, ch. 59, § 2,45 Stat. 109.)